Cooling System: Notes
DESCRIPTION
The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible, maintains normal operating temperature and prevents overheating.
The cooling system also provides a means of heating the passenger compartment and cooling the engine oil.
The cooling system consists of the following components:
| 1. | Refer to PRESSURIZED COOLANT BOTTLE . |
| 2. | Refer to PRESSURE CAP . |
| 3. | Refer to THERMOSTAT AND HOUSING ASSEMBLY . |
| 4. | Refer to ELECTRIC COOLING FAN . |
| 5. | Refer to RADIATOR . |
| 6. | Refer to WATER PUMP . |
| 7. | Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR . |
| 8. | Refer to POWERTRAIN CONTROL MODULE . |
| - | Refer to COOLANT . |
OPERATION
The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system. A separate and remotely mounted, pressurized coolant bottle is used. When the engine is cold the thermostat is closed. The cooling system has no flow through the radiator or engine oil cooler. The coolant flows through the engine, water pump, Exhaust Gas Recirculation (EGR) Cooler, and passenger compartment heater core. When the engine is warm the thermostat is full open. Coolant flows through the engine, radiator, engine oil cooler, passenger compartment heater core, and water pump.